a.source {
    line-height: normal;
    font-family: Varela Round, sans-serif;
    font-weight: 600;
    text-decoration: none;
    font-size: 13px;
    color: #A7AAAE;
    position: absolute;
    left: 20px;
    bottom: 20px;
    border: 1px solid #A7AAAE;
    padding: 12px 20px 10px;
    border-radius: 50px;
    transition: all .1s ease-in-out;
    text-transform: uppercase;
}

a.source:hover {
    background: #A7AAAE;
    color: white;
}